Eclipse RCP - no persistent classes found for query class

[algebraiker]

Hi,

kämpfe noch immer damit, dass die Datensätze in meiner View nicht zu sehen sind.

Hier die Fehler- und Warnmeldung, woran es (wahrscheinlich) liegt:

17.10.2011 13:08:43 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.0.CR2}
17.10.2011 13:08:43 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.0.0.CR4}
17.10.2011 13:08:43 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
17.10.2011 13:08:43 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
17.10.2011 13:08:43 org.hibernate.ejb.packaging.InputStreamZippedJarVisitor doProcessElements
WARN: HHH015010: Unable to find file (ignored): bundleresource://27.fwk25860399
java.io.FileNotFoundException: C:\workspace\ToolProject\bin (access is denied)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at org.eclipse.osgi.framework.util.SecureAction.getFileInputStream(SecureAction.java:124)
at org.eclipse.osgi.baseadaptor.bundlefile.FileBundleEntry.getInputStream(FileBundleEntry.java:56)
at org.eclipse.osgi.framework.internal.core.BundleURLConnection.connect(BundleURLConnection.java:53)
at org.eclipse.osgi.framework.internal.core.BundleURLConnection.getInputStream(BundleURLConnection.java:99)
at java.net.URL.openStream(Unknown Source)
at org.hibernate.ejb.packaging.InputStreamZippedJarVisitor.doProcessElements(InputStreamZippedJarVisitor.java:60)
at org.hibernate.ejb.packaging.AbstractJarVisitor.getMatchingEntries(AbstractJarVisitor.java:148)
at org.hibernate.ejb.packaging.NativeScanner.getClassesInJar(NativeScanner.java:126)
at org.hibernate.ejb.Ejb3Configuration.addScannedEntries(Ejb3Configuration.java:482)
at org.hibernate.ejb.Ejb3Configuration.addMetadataFromScan(Ejb3Configuration.java:472)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:358)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at model.ModelProvider.<init>(ModelProvider.java:38)
at model.ModelProvider.getInstance(ModelProvider.java:62)
at toolproject.View.createViewer(View.java:49)
at toolproject.View.createPartControl(View.java:35)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:367)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:529)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1608)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:649)
at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:576)
at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568)
at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272)
at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:982)
at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2626)
at org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWindow.java:2965)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2946)
at org.eclipse.ui.internal.WorkbenchWindow.busyOpenPage(WorkbenchWindow.java:761)
at org.eclipse.ui.internal.Workbench$21.runWithException(Workbench.java:1045)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803)
at org.eclipse.ui.internal.Workbench$28.runWithException(Workbench.java:1384)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:179)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4342)
at org.eclipse.ui.internal.StartupThreading.runWithoutExceptions(StartupThreading.java:94)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1379)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2335)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at toolproject.Application.start(Application.java:20)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 5
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: true
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [org.postgresql.Driver] at URL [jdbcostgresql://localhost:5432/prog]
17.10.2011 13:08:43 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=postgres, password=****, autocommit=true, release_mode=auto}
17.10.2011 13:08:43 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
17.10.2011 13:08:43 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException
17.10.2011 13:08:43 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000268: Transaction strategy: org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory
17.10.2011 13:08:43 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
17.10.2011 13:08:43 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000228: Running hbm2ddl schema update
17.10.2011 13:08:43 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000102: Fetching database metadata
17.10.2011 13:08:44 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000396: Updating schema
17.10.2011 13:08:44 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000232: Schema update complete
17.10.2011 13:08:44 org.hibernate.hql.internal.QuerySplitter concreteQueries
WARN: HHH000183: no persistent classes found for query class: select a from model.Article a

Die Klasse Article sieht so aus:

package model;

import javax.persistence.Column;
import javax.persistence.Entity;

@SuppressWarnings("serial")
@Entity
public class Article extends BaseEntity {

   @Column(nullable = false, unique = true)
   private String number;

   @Column(nullable = false)
   private String name;

   private float price;
   
   public String getNumber() {
      return number;
   }

   public void setNumber(String number) {
      this.number = number;
   }

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }

   public float getPrice() {
      return price;
   }

   public void setPrice(float price) {
      this.price = price;
   }
}

Model Provider und die View:

package model;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

public class ModelProvider {
   public static  ModelProvider INSTANCE = null;
   private List<Article> articles;

   @SuppressWarnings("unchecked")
   private ModelProvider()
   {
      EntityManagerFactory emf = Persistence.createEntityManagerFactory("adb");

      // First unit of work
      EntityManager em = emf.createEntityManager();
      EntityTransaction tx = em.getTransaction();
      
      tx.begin();
      List l = em.createQuery("select a from model.Article a").getResultList();
      articles = new ArrayList<Article>();
      for(Iterator i = l.iterator(); i.hasNext();)
      {
          Article a = (Article) i.next();
          articles.add(a);
      }
      //System.out.println(articles.get(0).getName());
   }
   
   public List<Article> getArticles() {
      return articles;
   }
   
   public static ModelProvider getInstance()
   {
      if (INSTANCE == null) {
         INSTANCE = new ModelProvider();
      }
      
      return INSTANCE;
   }
}

package toolproject;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.part.ViewPart;

import model.Article;
import model.ModelProvider;

public class View extends ViewPart {
   public static final String ID = "ToolProject.view";

   private TableViewer viewer;
   
   public void createPartControl(Composite parent) {
      GridLayout layout = new GridLayout(2, false);
      parent.setLayout(layout);
      Label searchLabel = new Label(parent, SWT.NONE);
      searchLabel.setText("Search: ");
      final Text searchText = new Text(parent, SWT.BORDER | SWT.SEARCH);
      searchText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL
            | GridData.HORIZONTAL_ALIGN_FILL));
      createViewer(parent);
   }

   private void createViewer(Composite parent) {
      viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL
            | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.BORDER);
      createColumns(parent, viewer);
      final Table table = viewer.getTable();
      table.setHeaderVisible(true);
      table.setLinesVisible(true);

      viewer.setContentProvider(new ArrayContentProvider());
      // Get the content for the viewer, setInput will call getElements in the
      // contentProvider
      viewer.setInput(ModelProvider.getInstance().getArticles());
      // Make the selection available to other views
      getSite().setSelectionProvider(viewer);
      // Set the sorter for the table

      // Layout the viewer
      GridData gridData = new GridData();
      gridData.verticalAlignment = GridData.FILL;
      gridData.horizontalSpan = 2;
      gridData.grabExcessHorizontalSpace = true;
      gridData.grabExcessVerticalSpace = true;
      gridData.horizontalAlignment = GridData.FILL;
      viewer.getControl().setLayoutData(gridData);
   }

   public TableViewer getViewer() {
      return viewer;
   }

   // This will create the columns for the table
   private void createColumns(final Composite parent, final TableViewer viewer) {
      String[] titles = { "Number", "Name", "Price"};
      int[] bounds = { 100, 100, 100};

      // First column is for the first name
      TableViewerColumn col = createTableViewerColumn(titles[0], bounds[0], 0);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return a.getNumber();
         }
      });

      // Second column is for the last name
      col = createTableViewerColumn(titles[1], bounds[1], 1);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return a.getName();
         }
      });

      // Now the gender
      col = createTableViewerColumn(titles[2], bounds[2], 2);
      col.setLabelProvider(new ColumnLabelProvider() {
         @Override
         public String getText(Object element) {
            Article a = (Article) element;
            return ""+a.getPrice();
         }
      });
   }

   private TableViewerColumn createTableViewerColumn(String title, int bound, final int colNumber) {
      final TableViewerColumn viewerColumn = new TableViewerColumn(viewer,
            SWT.NONE);
      final TableColumn column = viewerColumn.getColumn();
      column.setText(title);
      column.setWidth(bound);
      column.setResizable(true);
      column.setMoveable(true);
      return viewerColumn;

   }

   
/**
    * Passing the focus request to the viewer's control.
    */

   public void setFocus() {
      viewer.getControl().setFocus();
   }
}

persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
        http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

    <!-- JPA test "unit" -->
    <persistence-unit name="adb" transaction-type="RESOURCE_LOCAL" >
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
         
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/prog"/>
            <property name="hibernate.connection.username" value="postgres"/>
            <property name="hibernate.connection.password" value="postgres"/>
            <property name="hibernate.connection.pool_size" value="5"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
        </properties>
    </persistence-unit>

</persistence>

Hat jemand eine Idee, woran es liegt und was ich tun muss, damit es funktioniert? Google brachte - mal wieder - wenig.

 

[Atze]

java.io.FileNotFoundException: C:\workspace\ToolProject\bin (access is denied)

hört sich nach windows UAC an. schonmal nen workspace auf D: o.ä. erstellt und dort versucht?

 

[algebraiker]

Hi,

leider habe ich keine andere Partition, die ich verwenden könnte und komischerweise ist auch jeder Ordner unter meinem Windows 7 schreibgeschützt. "Rechtsklick -> Eigenschaften -> Attribute: Schreibgeschützt aufheben" bringt auch nichts, denn sobald ich das Eigenschaften-Fenster geschlossen habe, ist es wieder als schreibgeschützt markiert.

Diese Exception verstehe ich ohnehin nicht, da ich keinerlei Files in meinem Projekt (im Code) verwende.

Was mir noch Kopf zerbrechen macht, ist, folgende Stelle in ModelProvider.java:

List l = em.createQuery("select a from model.Article").getResultList();
		articles = new ArrayList<Article>();
		for(Iterator<Article> i = l.iterator(); i.hasNext();)
		{
		 	Article a = i.next();
		 	articles.add(a);
		}

Wenn ich die Länge des Arrays ausgeben möchte, bekomme ich da 0 zurück.

List l = em.createQuery("from model.Article").getResultList();
		articles = new ArrayList<Article>();
		for(Iterator<Article> i = l.iterator(); i.hasNext();)
		{
		 	Article a = i.next();
		 	articles.add(a);
		}
		System.out.println("Länge der Article-Arrayliste: " + articles.size());

17.10.2011 14:30:58 org.hibernate.hql.internal.QuerySplitter concreteQueries
WARN: HHH000183: no persistent classes found for query class: from model.Article
Länge der Article-Arrayliste: 0

Allerdings bekomme ich die View ja zu sehen, nur sieht man die Datensätze eben nicht - ich vermute ja wegen der obigen Warnung.

 

[algebraiker]

Hi,

auch auf einer anderen Partition ist das Ergebnis dasselbe. Weiß jemand Rat, wie ich das lösen könnte?

 

[algebraiker]

Hi,

okay, das Problem scheint fast gelöst zu sein. Hier fand ich folgendes stehen:

But is it a requirement to have the EntityManagerFactory in the same bundle as the persistence.xml?
Apparently it is... so now it works

So auch bei mir. Das ist insofern komisch, als dass ich im Classpath den Pfad dazu schon angegeben habe. Aber nun gut.. Nachdem ich die persistence.xml in den Bibliotheksordner schob, wo sich hibernate-entitymanager-4.0.0.CR4.jar befindet, funktioniert das Ganze und ich bekomme die Werte aus meiner Datenbank, aber obige FileNotFoundException mit dem Access is denied kriege ich nach wie vor geschmissen.

Jemand eine Idee, woran das liegt?